John Herschel discovered NGC 623 = h2425 on 30 Nov 1837 and recorded "F, S, R; the following of two [with h2424 = NGC 619]." His position is accurate.
400/500mm - 17.5" (11/10/96): brighter of pair with NGC 619 2.9' preceding. Fairly faint, fairly small, 1.0' diameter, round. Collinear with NGC 619 and NGC 612 14' W.
Notes by Steve Gottlieb